Antiquity Publications, {s.a.}
Majalah, Jurnal, Buletin
edited by Yvonne Marshall
Routledge, 1997
Buku Teks
Cottrell, Leonard, author
World Pub., 1964
Buku Teks
edited by Mari Pritchard Parker, Elvio Angeloni
McGraw-Hill, 2013
Buku Teks
Jessup, Ronald, author
Macdonald, 1968
Buku Teks